Mehmet, if you wish to install v2019.2.9 you will find it in downloads under your profile (top right this screen), you will also find your license if required.

With WX5 v2019.2.9 you can open a project created in v2019.1.8, after install you will see the project in the default directory, when you open it you will be given the option to duplicate it, please do so (although by choice I would open WX5 2019.1.8, open the project and go to step5 export project to create a complete backup iwzip file if that option was available to me).